How does Invoice Express work?

  • Invoice Express is a way to submit an invoice using a touch-tone phone.
  • Several days of processing time are saved when you use Invoice Express.
  • For each line of your invoice, use your telephone number pad to report units of service provided.
  • You must mail in your invoice if you need to lower your rate. Invoice Express does not allow rate changes by telephone.
  • The information you enter goes into the main computer in Olympia at 4:30 PM each business day.
  • You can enter your invoice by telephone at any time of the day or night, seven days per week.
  • Do not worry about having your invoice returned because of errors. You can correct errors on the spot.
  • No problems with double entry: Once your claimed services have been put into SSPS either by mail or telephone, Invoice Express will not allow entry of an invoice a second time.

Submit your SSPS invoice for payment or inquire about a submitted invoice

The Invoice Express toll free number is 1-888-461-8855, and is printed at the top of every SSPS invoice.

An operator is available during normal business hours if the caller has problems, however SSPS staff cannot submit your invoice information for you.


  • Callers may choose either English or Spanish voice prompts.
  • Callers may choose to complete an entire invoice, or to complete selected pages of their invoice.
  • Callers may choose to check on the status of an invoice.
  • Callers may use the toll free line any time of day or night.

Helpful Information about Invoice Express

View the Invoice Express Brochure (DSHS 22-369 PDF)